Grinding-machine



(No Model.)

W. S. ROBBINS. GRINDING MACHINE.

No. 401,212. Patented Apr. 9, 1889.

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UNITED STATES PATENT GRINDING- MACHINE.

SPECIFICATION forming part of Letters Patent No. 401,212, dated April 9,1889;

Application filed July 20, 1888. Serial No. 280,5 '78. (No model) To allwhom it may concern.-

Be it known that 1, WILLIAM S. ROBBINS, a citizen of the United States,residing at New Bedford, in the county of Bristol and State ofMassachusetts, have invented a new and useful Improvement inGrinding-Machines, of which the following is a specification.

In the accompanying drawings, Figure 1 is a side elevation of themachine, and Fig. 2 is a view showing the detail of some of the workingparts.

The band-wheels h and c are journaled on studs projecting from the sideof the standard a, and are connected by a band, cl. The tube 9, havingweight h, is pivoted to the top of the standard a at f. The rod 6 isplaced within the tube g, and secured by the thumbscrew 2'.

The outer end of the rod 6 is provided with a fork, a between which ishung the yoke m by the shaft of the band-wheel k. The rod p is jonrnaledin the yoke m and its end provided with a bevel-gear, 0, which mesheswith a bevel-gear on the shaft of the bandvheel k.

The lower end of the rod 1) is j ournaled in the boX q, and is providedwith a bevel-gear, 1', which meshes with the bevel-gear s on the shaft'1, on which shaft is mounted the emerywheel 1. The box q is providedwith a handle, 2, by means of which the work of the emerywheel iscontrolled. The band-wheel c has a double face, in order to take theband from the Wheel 6, and also carry the band to the wheel it.

\Vhat I claim is- In a grinding machine, the combination of the standarda, band-wheels b and c, pivoted tube g, rod 8, provided with fork :11,the sh aft 12, provided with band-wheel 7s, and bevel-gear meshing withbevel-gear on rod 19 and pivoting the fork as and yoke m together, therod 1), journaled in yoke m and box q, and provided with bevel-gears 0and 0", the box q provided with handle .2, having" journaled in it theshaft o, having mounted on it the emerywheel 1 and bevel-gear s, all asshown and described.

IVILLIAM S. ROBBINS.

\Vitnesses:

HENRY W. MASON, Tnos. M. JAMES.

